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Heyy guys.. hope you guys are good! I need some help! I've rebuilt my top-end.. but now when i try to start the bike, it only kicks from half way through the kick start. So the first half of the kick is like play, it only catches after half way and the bike doesn't start! What does this mean...

Thanks! I really appreciate your guys help! I've finally managed to find a decent machine shop and this guy told me to change my piston to a 66.50 (2nd available oversize) and he says that I'll have to go as much as that to get it cleaned up! So hopefully they'll change the piston for me.. And...

I've already received the piston. Take a look at the size.

Okay.. now it seems like the bottom of my cylinder is abit smaller then the rest. If i put the piston in from the top of the cylinder, it slips in easily, however when it reaches the bottom it gets stuck!!! Please help!!

My new piston (Wiseco 66.00mm) does not fit into the cylinder, however my old piston (stock standard Yamaha 66.00mm) slips into the cylinder and still has slight play. Now I'm really confused!

No i haven't came across it. It's a very small piece though, it's the piece between the two openings on the piston (the reed cage side).

Note sure exactly what happened as i bought the bike like this. A very small piece of the piston is broken off.. the cylinder does seem fine and it has been honed. Oh yes, does honing affect the bore size?

Hi guys! I'm new here.. I've got a 06" Blaster and i need to rebuild the top end, I've sent my cylinder to the machine shop and the guy said it seems fine so it will NOT need to be bored. So i bought a 66.00mm (stock size) Wiseco piston and i need to drop it in. It's my first time doing this so...